何もかも洗いざらい言ってしまえ。

何もかも洗いざらい言ってしまえ。

You had better tell me the whole story.

何(なに)もかも洗(あら)いざらい言(い)ってしまえ。

Nanimokamo araizarai itteshimae.

何もかも (なにもかも)

anything and everything; just about everything

洗い浚い (あらいざらい)

everything

言う (いう、ゆう)

to say; to utter; to declare; to name; to call; to go (e.g. "the alarm went ping"); to make a noise

Readings: カ、なに、なん、なに-、なん-

Meaning: what

Readings: セン、あら.う

Meanings: wash, inquire into, probe

Readings: ゲン、ゴン、い.う、こと

Meanings: say, word